| Abington Accountants Ltd. | Professional & scientific | 2005 |
| Abington Bespoke Cleaning Ltd | Administrative & support | 2022 |
| Abington Civils Limited | Construction | 2016 |
| Abington Computer Services Limited | Administrative & support | 2011 |
| Abington Consulting LLP | | 2016 |
| Abington Court Investments Limited | Real estate | 1993 |
| Abington Court Residents Company Limited | Households | 1985 |
| Abington Decorating Supplies Limited | Wholesale & retail | 1993 |
| Abington Dental Practice Ltd | Health & social care | 2014 |
| Abington Estate Planning Services Ltd. | Financial services | 2003 |
| Abington Funeral Services Limited | Other services | 2012 |
| Abington Glass Properties Ltd | Real estate | 2024 |
| Abington Grove Management Company Limited | Households | 2008 |
| Abington Indian Takeaway Ltd | Hospitality | 2024 |
| Abington Pest Control Ltd | Administrative & support | 2015 |
| Abington Roofing Limited | Construction | 2002 |
| Abington Sports Medicine Clinic Limited | Health & social care | 1996 |
| Abington Vale Convenience Store Ltd | Wholesale & retail | 2019 |
| Abington Vale Fish and Chip Ltd | Hospitality | 2025 |
| Abington Vale Home Improvements Ltd | Construction | 2014 |
| Abington Vale Scaffolding Limited | Construction | 2022 |
| Abington X Limited | Administrative & support | 2016 |
| Abitiamo Ltd | Construction | 2016 |
| ABL Investments Limited | Wholesale & retail | 2015 |
| Ablaze Limited | Financial services | 2016 |
| Able AMS Ltd | Real estate | 2020 |
| Able Mortgages Limited | Financial services | 2019 |
| Able Professional Services Ltd | Health & social care | 2014 |
| Able Transport Ltd | Transport & logistics | 2019 |
| Ablett Property LLP | | 2005 |
| Ableway Developments Limited | Construction | 1997 |
| Ableway Rentals Limited | Real estate | 2025 |
| Abms Holdings Limited | Financial services | 2022 |
| Abms Trading Limited | Wholesale & retail | 2023 |
| Abna Properties Limited | Real estate | 2022 |
| Abode Property Staging Ltd | Professional & scientific | 2025 |
| Abokumah Limited | Health & social care | 2016 |
| Aboloo Properties Limited | Real estate | 2025 |
| Abora Care (Grays) Limited | Health & social care | 2026 |
| Abora Care Stafford Limited | Health & social care | 2025 |
| Abora Developments Limited | Construction | 2017 |
| Abora Investments Limited | Financial services | 2020 |
| Abora Properties (Grays) Limited | Real estate | 2026 |
| Abora Properties (Littlehampton) Limited | Real estate | 2026 |
| Abora Racing Limited | Transport & logistics | 2025 |
| Abound Aerospace Limited | Financial services | 2024 |
| About Consulting Group Ltd | Education | 2006 |
| Above and Beyond Solutions Ltd | Professional & scientific | 2022 |
| Above the Clouds Consultancy Ltd | Professional & scientific | 2023 |
| ABP Ireland Exports Unltd. | Water & waste | 2003 |
| ABR Express Ltd | Wholesale & retail | 2023 |
| Abraxas (UK) LLP | | 2002 |
| Abraxas Cookshop (Northampton) Limited | Wholesale & retail | 2006 |
| Abraxascookshop Limited | Wholesale & retail | 2005 |
| Abrol & Kapoor Limited | Financial services | 2025 |
| Absoftsol Limited | Information & communication | 2018 |
| Absolut HR Ltd | Professional & scientific | 2018 |
| Absolute Business Finance UK Ltd | Financial services | 2019 |
| Absolute Healthcare Ltd | Health & social care | 2017 |
| Absolute Risk Management Ltd | Professional & scientific | 2015 |
| Abstract Limited | Professional & scientific | 1988 |
| ABV Brickwork Ltd | Construction | 2022 |
| AC Electrical (MK) Limited | Construction | 2015 |
| AC Immigration Ltd | Professional & scientific | 2020 |
| AC Quality Painters Ltd | Construction | 2025 |
| AC Turcanu Ltd | Construction | 2024 |
| AC Water Connections Limited | Construction | 2023 |
| ACA Interiors Ltd | Construction | 2019 |
| Acacia Consultants and Associates Ltd | Real estate | 2006 |
| Academic Experts Ltd | Education | 2021 |
| Academic Insights Consultancy Ltd | Education | 2024 |
| Academy Care Ltd | Health & social care | 2018 |
| Acan Developments Limited | Real estate | 1962 |
| Acasa RO Ltd | Wholesale & retail | 2016 |
| Accai Limited | Extraterritorial | 2024 |
| Acccm Healthcare Ltd | Health & social care | 2014 |
| Accedo Consulting Limited | Information & communication | 2017 |
| Accelerate Leadership Ltd | Professional & scientific | 2003 |
| Accelerating Learning Limited | Education | 2016 |
| Accelerating Ltd | Manufacturing | 2021 |
| Acceptacard Limited | Financial services | 2009 |
| Access 2 Limited | Construction | 2008 |
| Access Assessment Centres Limited | Administrative & support | 2016 |
| Access Communications Group Limited | Information & communication | 1990 |
| Access Control Ltd | Manufacturing | 2017 |
| Access Highways Services Ltd | Professional & scientific | 2025 |
| Access Irrigation Limited | Manufacturing | 1976 |
| Access Panel Shop Limited | Wholesale & retail | 2021 |
| Accessibility Alliance Ltd | Professional & scientific | 2019 |
| Accessible Mobility Africa CIC | Energy | 2026 |
| Accessible Orthodontics (AD) Limited | Health & social care | 2016 |
| Accessible Orthodontics (N) Ltd | Health & social care | 2006 |
| Accession Limited | Professional & scientific | 2017 |
| Accessory Bits Limited | Wholesale & retail | 2003 |
| Accomplish CYP Limited | Health & social care | 2020 |
| Accorn Healthcare Consulting Ltd | Health & social care | 2020 |
| Accoro Limited | Real estate | 2021 |
| Accoro Staging & Maintenance Ltd | Professional & scientific | 2026 |
| Accountant Limited | Professional & scientific | 2020 |
| Accounts Academy Limited | Information & communication | 2024 |